Re: rcu stalls during fstests runs for xfs

[Kunwu Chan]

On 1/26/26 19:30, Shinichiro Kawasaki wrote:
>  kernel: xfs/for-next, 51aba4ca399, v6.19-rc5+
>      block device: dm-linear on HDD (non-zoned)
>      xfs: zoned

I had a quick look at the attached logs. Across the different runs, the
stall traces consistently show CPUs spending extended time in
|mm_get_cid()|along the mm/sched context switch path.

This doesn’t seem to indicate an immediate RCU issue by itself, but it
raises the question of whether context switch completion can be delayed
for unusually long periods under these test configurations.

-- 
Thanx, Kunwu